Vulnerability Monitor

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CVE-2018-0174

A vulnerability in the DHCP option 82 encapsulation functionality of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability exists because the affected software performs incomplete input validation of option 82 information that it receives in DHCP Version 4 (DHCPv4) packets from DHCP relay agents. An attacker could exploit this vulnerability by sending a crafted DHCPv4 packet to an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuh91645.

Published

2018-03-28T22:29:01.233

Last Modified

2025-10-28T13:57:42.903

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.6 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

10.0

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-20
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios 12.2\(33\)sre7a Yes
Operating System cisco ios_xe 12.2\(33\)sre7a Yes
Hardware cisco 7600_series_route_switch_processor_720 - No
Hardware cisco 7600_series_supervisor_engine_32 - No
Hardware cisco 7600_series_supervisor_engine_720 - No
Operating System cisco ios ≤ 15.2\(4a\)ea5 Yes
Operating System cisco ios_xe ≤ 15.2\(4a\)ea5 Yes
Hardware rockwellautomation allen-bradley_stratix_8300 - No
Operating System cisco ios ≤ 15.2\(6\)e0a Yes
Operating System cisco ios_xe ≤ 15.2\(6\)e0a Yes
Hardware rockwellautomation allen-bradley_armorstratix_5700 - No
Hardware rockwellautomation allen-bradley_stratix_5400 - No
Hardware rockwellautomation allen-bradley_stratix_5410 - No
Hardware rockwellautomation allen-bradley_stratix_5700 - No
Hardware rockwellautomation allen-bradley_stratix_8000 - No
References